Lawrence Craven, a doctor from the USA, is the author of several published reports, one of _______ introduced the idea in 1953 _______ aspirin could reduce the risk of heart attacks.
Only when the final examination was coming ______ he had quite a lot to do.
Practicing Chinese kong fu can not only ______ one’s strength, but also develop one’s character.
Scientists are convinced ___ the positive effect of laughter ____ physical and mental health.
—Never say never, and you’ll make it. —That’s it..
My uncle hasn’t been able to quit smoking, but at least he has .